Three-dimensional analytical solution of acoustic emission source location for cuboid monitoring network without pre-measured wave velocity  

无需预先测速的长方体监测网络声发射源三维解析定位方法(英文)

作　　者：董陇军[1,2] 李夕兵[1] 周子龙[1] 陈光辉[1] 马举[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083 [2]Australian Centre for Geomechanics,The University of Western Australia

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第1期293-302,共10页中国有色金属学报（英文版）

基　　金：Projects(11447242,41272304,51209236,51274254)supported by the National Natural Science Foundation of China;Project(2015CB060200)supported by the National Basic Research Program of China

摘　　要：To find analytical solutions of nonlinear systems for locating the acoustic emission/microseismic（AE/MS） source without knowing the wave velocity of structures, the sensor location coordinates were simplified as a cuboid monitoring network. Different locations of sensors on upper and lower surfaces were considered and used to establish nonlinear equations. Based on the proposed functions of time difference of arrivals, the analytical solutions were obtained using five sensors under three networks. The proposed analytical solutions were validated using authentic data of numerical tests and experiments. The results show that located results are consistent with authentic data, and the outstanding characteristics of the new solution are that the solved process is not influenced by the wave velocity knowledge and iterated algorithms.为得到未知波速结构声发射源定位坐标求解的解析解,将传感器阵列简化为长方体,以求得最小监测网络下的声发射源定位解析解。考虑传感器在长方体表面不同位置的各种情形,建立对应的定位控制非线性方程组。根据建立的方程组和到时差,将监测网络分为3种情况,分别求得未知波速情况下采用5个传感器进行定位的声发射源定位解析解。将得到的声发射源定位解析解应用到数值和声发射试验中进行验证。结果显示,所求得的解析解避免了预先测定波速与迭代算法求解给定位带来的误差,定位结果与真实坐标一致。

关 键 词：acoustic emission seismic source sensor LOCATION analytical solution 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]